Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/video_renderer_algorithm.h

Index: media/filters/video_renderer_algorithm.h
diff --git a/media/filters/video_renderer_algorithm.h b/media/filters/video_renderer_algorithm.h
index 0ce78092a3bede603e8c74399e9cb4f79923c191..929a87b19f9f3d9a47034c60746d4fb702f4b879 100644
--- a/media/filters/video_renderer_algorithm.h
+++ b/media/filters/video_renderer_algorithm.h
@@ -51,7 +51,7 @@ class MediaLog;
 class MEDIA_EXPORT VideoRendererAlgorithm {
  public:
   VideoRendererAlgorithm(const TimeSource::WallClockTimeCB& wall_clock_time_cb,
-                         scoped_refptr<MediaLog> media_log);
+                         MediaLog* media_log);
   ~VideoRendererAlgorithm();
 
   // Chooses the best frame for the interval [deadline_min, deadline_max] based
@@ -267,7 +267,7 @@ class MEDIA_EXPORT VideoRendererAlgorithm {
   // UpdateEffectiveFramesQueued().
   size_t CountEffectiveFramesQueued() const;
 
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
   int out_of_order_frame_logs_ = 0;
 
   // Queue of incoming frames waiting for rendering.